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3g Wireless Communication Methods
Descripción
A level, A2 (Chapter 3) IT Mapa Mental sobre 3g Wireless Communication Methods, creado por Gladys Mba el 23/01/2017.
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it
ict
a-level
a2
chapter 3
it
chapter 3
a level, a2
Mapa Mental por
Gladys Mba
, actualizado hace más de 1 año
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Creado por
Gladys Mba
hace más de 7 años
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Resumen del Recurso
3g Wireless Communication Methods
Bluetooth(R)
A protocol for wireless communication
Used for communication between close portable devices
Mobile phone headset
Transferring files between phones
Using a laptop as a modem of transferring files
Stream video from mobile to TV
Advantages
O- No line of sight required
O- Widely available
O- Radiofrequency licence not required
O- Passkey needed for authorised access
Disadvantages
X- 10m range
X- Slow 3Mbps alone of 24Mbps with v3 or v4 and Wi-Fi
X- Only connected to one device at a time
Radio
A protocol for wireless communication known are Wi-Fi
Three standards
802.11a
802.11b - Bandwidth up to 11 Mbps
802.11g Bandwidth up to 54 Mbps
Uses
Wireless access in organisations and hotspots
Computers with WNIC (wireless network interface card) or laptops
mobile phones and tables
printers and game consoles
WiFi direct - WiFi enabled devices to communicate directly with each other and transfer files without a wireless access point
Advantages
O- No need for cables
O- Devices not restricted by location
O- Mobile users save money
O- Line of sight not necessary
O- Good transfer rates for internet
O- Very high compatibility standards
Disadvantages
X- Restricted transfer rates
X- Restricted range 30 metres indoors
X- Further restricted by wall and steel
X- Bandwidth is reduced greatly if many devices are connected to a single wireless access point
X- Susceptible to hacking f security is not set up properly
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